I think this is the most minimal iOS 13 app using the new scene API that is set up in Objective-C rather than using a storyboard and UIApplicationSceneManifest. gist.github.com/douglashill/1bd6ba60b50315455ed2b2381bc355dc

25 minutes later: If you declare a UIApplicationSceneManifest to specify the scene delegate, you can not have an app delegate at all.